Dry battery.



E. HVROLLINSHON.

DRY BKITERY.

APPLICATION FILED AUG-3| 1917.

Patented Nov. 12, 1918.

maq ssa lf lflfillllllllun WHH HHr b hH II EARL H. ROLLINSON, 0F LYONSFARMS, NEW JERSEY.

DRY BATTERY.

Specification oi Letters Patent.

Patented Nov. 12, 1918.

Application filed August 3, 1917. Serial No. 184,188.

To all whom it may concern Be it known that I, EARL Hor'r Rollins-- soN,a citizen of the United States, residing at Lyons Farms, county ofEssex, and State of New Jersey, have invented a new and useful Imrovement in Dry Batteries, of which the follbwing is a specification.

It is Well known that the modern dry cell battery deteriorates With ageand quickly weakens when in use, and that after a period of rest, itwill recuperate. Attempts have been made to mix with the depolarizingagent, an electrolyte; but this method has not proved satisfactory, withthe result, that in many cases the cells are discarded, because they arethought to be completely exhausted, while in fact the cell only needselectrolyte of correct strength to start the chemical agent such actionagain.

Manufacturers of dry cells have somewhat standardized the constructionof the cell, in the following particulars: The body of the container oranode is of sheet zinc rolled into tubular form, with a shallowcupshaped disk set into the bottom and soldered in place. The containeris lined with absorbent paper and saturated with the excitinelectrolyte. The carbon electrode or cafiiode is in the center of thecell, and surrounded with the depolarizing agent. The surface of thedepolarizer is then covered with a layer of sand and a resinous wax ismelted and poured overthe surface of the sand to the top of thecontainer to keep it air tight in order to prevent evaporation of theelectrolyte as much as possible. The container is then incased in astrawboard tube, when it is ready for use.

In my prior application Scr. No. 171,802, filed May 29th, 1917, I haveset forth reasons why cells of the type just described may be givenlonger life, if inverted when in use and I have there described animproved form of battery holder, in which the cells are normallysupported for use in inverted position. The said battery holder, and theabove described cell, are admirably adapted for use in connection withmy present improvement, which consists in perforating the shallowcup-shaped bottom of the container, placing therein an excitingchlorid), and providing a cover for the cellloottom. When saturated,with water the salt solution trickles through the perforations and isabsorbed by the blotting paper as sal-ammoniac, (ammonium' lining whereit serves as an effective exciting electrolyte. Actual tests show thatthe life of a cell may be lengthened 50% or more.

In carrying out my invention I make use of the devices and structuresset forth in the following detailed description, and illustrated in thewherein:

Figure 1, is a side elevation partly in sec tion of a pair of cellsmounted in a battery accompanying drawings,

holder similar to that described in my prior application, above referredto.

Fig. 2, is a section of another form.

Fig. 3, is a plan of a cell bottom, perforated for use in connectionwith my improvement.

Figs. 4, and 5, are respectively, plan views of the cover and capsule,illustrated in Fig. 2. I

Similar reference numerals refer to like parts throughout thedescription and drawlngs.

The cells 1, are the usual standard construction having the zinccontainer made up of the tube 2, into which the cup-shaped bottom 3, issoldered. The container is lined with blotting paper 4, and filled withthe depolarizer 5, such as manganese dioxid with the carbon electrode 6,embedded in the center. The cup-shaped bottom 3 is perforated as at 7,and filled with the electrolyte so lution S. The cover 9, is then placedover the bottom of the cell, and which is placed in inverted position,as shown, into the aperture 10, of the battery holder 11, with theelectrodes 12, ard 13, connected to the connector strips 14, and 15,respectively, which are secured to the under face of the holder 11, bymeans of the screws 16. When the electrolyte solution has becomeexhausted from the cup-shaped bottom of the cell, it may be replenished.The saturated solution of the exciting electrolyte trickles through theapertures 7, and is absorbed by the blotting paper lining 4, whichserves to distribute it through the cell. The apertures 7, together withthe aperture 17, in the cover afford a vent for gases generated in thecell when in use, and therefore serve to prevent the swelling andoccasional bursting of the walls'of the cell, where it is otherwisehermetically sealed.

he improvement as thus far described is the form preferred, when thecell is completed as shown, at the factory with the exwith anelectrolyte located in seitl c shaped bottom and lieltl in place by ataclmble cover.

3. A dry cell. having a perforated shaped bottom, in 00 lolnetion withall rated in Figs. 3, 4c, and 5, and consists ol the trol 'te plteecl insel bottom outsltl= clip-member 19, having the circular corrucell ease,and e deiseheble cover t gution 26 in the bottom thereof, with e plucell. for holding said electrolyte a rality of apertures 21, tlrethrough; the elispl e l citing electrolyte in place. But Where theelectrolyte is to he applied to cells already in use, I n'efer to placethe electr olyte in a capsule which may be securely fixed to the bottomof the Cell; Such a capsule is 1 as corrugation 20 forms :1 Che. mel forontluoting the salt solution to the apert the bottom of the cell. The eover the cup-shaped, member 19, and v elatl with an offset :umuler thebottom the cell, and hel e capsule in place. lhe cover villecl Wi h anopellore ill, for the e: hatery lses. The capsule with tents either ingranule or compressed t e Ollcells already in use; wh n put in use m(rte 1s lClflQCl to the contents of the capsule.

if dQSlIGfl, the cup-member and. cover rial? form, can be eheapl'nmnufscturecl, sml or copshapeol pei solel for a nominal price to beapplied to nation with a. cap 45 containing an exciting t c s for s 1 1'3 be permanently secur ct together W11? to be e to the electrolyte theein, :eacly I in of a cell. To irete'the contents,

nle may be immelsezl 1n Wat moilients and it may then be '2 e cell as (Icribecl. 'fll pres ice the cup will be li'lill dry granulated sel l :1compressed tablet of is hen poured over the J Q56:

as the case he, unti T saturated, when the coveri :OllllllOIl of the ele0 will he 11ml: may as employed t place and that eh, ,g reel are merelyills-st is f my invelmoe; l battery cell.

1. A dry cell having means for supporting position, in combinetioi withrete cup-shaped bottom in come

